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Nanaimo Weather by Month
Average temperatures, rainfall and humidity for Nanaimo, Canada, month by month, built from OpenWeather's historical records. Use it to see what a typical Nanaimo month looks like before you travel — then check the live Nanaimo forecast for the days ahead.
Warmest month
August
25°C average high
Coolest month
December
2°C average low
Wettest month
March
162 mm of rain
Driest month
August
32 mm of rain
Average temperature and rainfall in Nanaimo by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 7°C | 3°C | -13°C / 15°C | 118 mm | 89% | 11 km/h |
| February | 7°C | 2°C | -8°C / 16°C | 90 mm | 84% | 13 km/h |
| March | 11°C | 4°C | -3°C / 19°C | 162 mm | 81% | 13 km/h |
| April | 14°C | 6°C | 1°C / 24°C | 88 mm | 76% | 13 km/h |
| May | 19°C | 10°C | 3°C / 32°C | 76 mm | 76% | 11 km/h |
| June | 21°C | 12°C | 7°C / 37°C | 69 mm | 74% | 12 km/h |
| July | 25°C | 15°C | 11°C / 35°C | 33 mm | 73% | 11 km/h |
| August | 25°C | 15°C | 10°C / 35°C | 32 mm | 76% | 11 km/h |
| September | 21°C | 12°C | 5°C / 31°C | 78 mm | 82% | 11 km/h |
| October | 14°C | 8°C | -2°C / 25°C | 113 mm | 87% | 11 km/h |
| November | 10°C | 5°C | -28°C / 17°C | 125 mm | 86% | 13 km/h |
| December | 6°C | 2°C | -13°C / 15°C | 141 mm | 89% | 13 km/h |
Best time to visit Nanaimo
The most comfortable time to visit Nanaimo is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around March, totalling about 1125 mm a year.
Travellers who prefer heat should aim for August, when highs average 25°C. March is the month to avoid if rain would spoil your plans — it averages 162 mm, roughly 5× the rainfall of August.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Nanaimo forecast for what is happening now.